Torch with concentric gas, oxygen, and mixture outlets



w. H. HAAK 2,598,787

TORCH WITH CONCENTRIC GAS, OXYGEN, AND MIXTURE OUTLETS June 3, 1952 5 Sheets-Sheet l Filed July 10, 1948 June 3, 1952 w H, HAAK y 2,598,787v

TORCH WITH CONCENTRIC GAS, OXYGEN, AND MIXTURE OUTLETS Filed July l0, 1948 3 Sheets-Sheet 2 //////////A 54 mui" e 55 ffy@ 44 v I C f of l- 45 45 54 i N J1 f5 6, 45'/ June 3, 1952 W H HAAK 2,598,787

TORCH WITH CONCENTRIC GAS, OXYGEN, AND MIXTURE OUTLETS 3 Sheets-Sheet 3 Filed July 10, 1948 fr/(ey:

Patented June 3, 1952 'reiten Wrru coNoEN'rn-Ic GAS, oxygen,

AND MIXFrUnE on'rLETs Werner H'. Haak, Brookfield, Ill. @Duration 11h10. 19148A Serial No- 38.969

The present invention relates to .a glass blow;` ing torch and as one of its objects is intended to provide a practical torch. that will produce .the greatest range of name, size varying from a small needle point :dame to. a large, bushy, llame.. j a type capable of softening Pyrex tubing up to 11m. mm.` in diameter. T he presenty torch also. provides a large annealing; flame Such a torch is designed to operate with oxygen and natural, mixed or articial gasesat pressuresbelow about two pounds per square inch. The torch forming. the subject matter'- of the presentl invention is intended to produce temperatures over most of its range of operation. that willreadily fuse quartz. All of thisis` accomplished withp'a device that is extremely easy. to operate so, as` to permit the glass blowertofgivc his. entire attention, to his Work. The presenty torch is silent in its operation throughout its entire range.

rIhus it is an objectofy the invention" to. prc vide a torch that possesses. lall ci thei foregoing characteristics andl will accomplish all of the foregoing objects.

Other objects and advantages in addtiOn to those Spooioolly Set forth will, booome apparoii. from the following dosorrtioa and. the drewings, in which Fia 1v is e more or loss4 diasremmeticsdolor vational View of a complete torch assembly ernbodying the present invention;

Fig 2 is an 3m31`gdL19Ht1l9naL- tilllafl view taken through the torch headillustrated in Fig. 1;

Fia '3 is an enlarged, longitudinal. Sectional view of the outer shell ofA thetorchheadshoyvn in Fig. l;

' Fig. 4 is an end elevational vievv or the outer shell shown in Fig. 3';

Fig. 5 is a longitudinal, sectional vievv shown partly in elevation of the intermediate 'etmember;

Fig. 6 is an end elevational view of the intermediate jet member shown in Fig.y 5;`

Fig. '7 is a longitudinal sectional'- view shown partly in end elevation of the central or inner jet member;

Fig. 8 is an end. elevationalA vlew of; the jet member shown in Fig. 7;

Fig. 9 is an enlarged, vertical, longitudinal sectional view taken throughV the' mixing. chamber illustrated in Fig. 1, the view being shown partly in elevation; o

Fig. 10 is av longitudinal sectional view through a mixing chamber, the viewbeingtal'cen-l along the line. Ill-IB; of` Fig. 9;I

2 claims.- (o1. 15s-277.4)

Fig. 11 is an enlargedv side elevational view of one of the distributing valves shown in Fig.v 1,;

Fig. 12 is a vertical, transverse.: sectional View taken through the valve, the view being taken along the line |2 ..|2 of Fig. 1,13.;

Fig. 13 is a horizontal, transverse, sectional View through the valve, the view being takenv along ther line |3f|3 of Fig. 11; and

Fig. 14 is a horizontal sectional view taken through the valve,v the view being taken along the line M -M of Fig. '12.

For purposes of illustration a single embodi-Y ment of the present invention has been selected and will be described hereinafter. It isA recog-v nized, of course, that many other embodiments of the presentl invention will occur to the man skilled in the art and it is recognized that the present embodiment may be so modied oralle tered Without departing from the intended scope. and spirit of the invention.

Referring now to the drawings'the invention is illustrated in the form of a torch generally inr-v dicated at 20 that includes a torchhead generally indicatedY at 2| that is fed bya plurality cgi-tubes generally indicated at 22. These tubes 2 2; are generally rigid and may be made of; copper tubing or the like4 and in turn are connected to flexible tubing 23 of rubber or likev material to a gas pipe 24 and an oxygen supply pipe 25. The gas pipe 24 may be connected to aA source ofnatural or artificial gas or mixture thereoi whereas the oxygensupplyA pipe 25. maybe oo n-v nected to a tank or other suitable source of oxygen.

Referring now to Fig. 2 the torch head 2|. comprises an outer shell 26 best shown in Figs. 2 and 3 that includes a cylindrical passage therein indicated at 2l. This cylindrical passage 2'7 is formed by the outer cylindrical wall' 26a of the shell 26 and an inner cylindrical Wall126'b of. the shell that is spaced from the outer'WallZBa. The

inner cylindrical Wall 26h also forms an innert passage 28 that is elongated toextend tlfiroughr-y out substantially the entire length of the torch head 2| and isflared as at 29. The rear Wall of the torch head 2| is provided with a threaded aperture 30 into which is threaded as' shown in Fig. 2 an intermediate cylindrical jet member- 3|-A that is hollow to providea passage32- throughout its entireV length. The inner Wall of the intera mediate jet member 3|I isthreaded as at 33to receive. the threaded end ofr an inneruor central jet member 34: shown in Figs. 2\and=7. Theinner wall. of. theyinnerjet member 34/ converges toward the outer end of the member soY as tov form a relatively small orice or jet area 35.

As can be noted in Fig. 2 the cylindrical wall of the intermediate jet member 3| is spaced from the cylindrical wall 26h of the outer shell 26 so as to provide therebetween an intermediate annular passage 36 that extends throughout substantially the entire length of the torch head 2|. The outer end of the intermediate torch member 3| is flanged as at 31 so as to close the open end of the intermediate annular passage 36 and this flange 31 is provided with radially disposed apertures 38 shown in Figs. 2, 5 and 6.

The outer shell 26 of the torch head 2| is apertured as at 39 (see Fig. 3) to provide communication with the outer annular passage 21 and again at v4|! to provide communication with the inner passage 28 of the outer shell 26. As best shown in Fig. 2 this latter aperture 46 provides communication with the intermediate annular passage 36. Each of the apertures 30, 40 and 3S is threaded to receive the threaded end of tubes 4|, 42 and 43 respectively which make up the plurality of tubes indicated in Fig. 1.

As best shown in Figs. 1 and 9 the tube 4| is connected to a coupling member 44 that is threaded onto a nipple 45 that projects outwardly from a mixing chamber 46. This mixing chamber 46 is provided with a pair of passages 41 and 48, the latter of which is threaded to receive the lower threaded end of the nipple 45. Passage 41 communicates with passage 48 as best shown in Fig. 9 and its lower end is threaded to receive a pipe segment or tube segment 49. The lower end of passage 48 is threaded to` receive the threaded end of a pipe or tube segment 50. The nipple 45 is provided with a passage 5| extending substantially throughoutV its entire length that merges at its lower end into a passage 52 having a relatively small cross sectional area. Radial passages 53 extend through the wall of the nipple 45 adjacent to the lower end of the passage 5| and communicate with an annular chamber 54 that is formed between the wall of the nipple 45 and the wall of passage 48 formed in the mixing l chamber 46.

To the tube segments 49 andV 50 respectively are attached iiexible tubes 55 and 56 respectively.

Tubes 42 and 43 pass through the mixing chamber 48 as best shown in Figs. 1 and 9 and to their l free ends are attached flexible tubes 51 and 5S.

Mounted on the end of gas pipe 24 is a distributing valve generally indicated at 59 and on the end of oxygen pipe 25 is a distributing valve generally indicated at 60.

As best shown'in Figs. 1l to 14 inclusive each of the distributing valves 59 and 60 comprises a cylindrical shell 6| in which is mounted for rotation a rotatable valve member or plug 62 that is provided with a boss 63 at one end that is held in an aperture 64 in the end wall 65 of the distributing valve 59 or 60 and aV boss 55 on the other end on which is attached a manually operated lever 61. The free end of the boss 63 provides a threaded shank portion 68 on which is `threaded a nut 69 that holds the'assembly together.

As shown in Figs. lland 13 the' wall of the shell 6| is providedrwith a radial passage 15 that is threaded to receive the threaded end of the gas pipe 24 (or oxygen pipe 25 in the case of valve The wall of shell 6| is further apertured `as at 1| and 12 to receivethreaded pipe segments 13 and14, respectively to the free end of which are secured the ilexibletubes 55 and 58 respec- I outer annular chamber 21.

either clockwise or counterclockwise direction asV viewed in Fig. 13, it can be readily seen that the passage 16 in shell 6| of the valve may be partially or fully closed depending upon the direction of rotation of the movable valve member 62. The valve member 62 with its aperture 15 and the apertures 10 and 1| are all so proportioned with respect to each other that the valve member 62 may be rotated to preclude the iiow of oxygen or gas into the selected conduit as desired. Thus it is possible by manipulation of either valve 59 or 60 to regulate the gas or oxygen flow through the various tubes 55, 58, 56 and 51.

By referring to Figs. 1 and 2 it can be seen that passage 32 (Fig. 2) in the torch head 2| communicates with the mixing chamber formed in the nipple 45 (Fig. 9) of the mixing chamber member 46 so that this passage 32 and hence the central or inner torch member 34 is provided with a mixture of gas and oxygen which is mixed prior to its'reaching the orifice 35 of the central torch member. The intermediate annular passage 36 is fed through tubes 42 and 23 with oxygen from the oxygen supply pipe 25, whereas the outer annular chamber 21 is provided with gas through tubes 43 and 58 from the gas line indicated at 24. Thus at the outer or burning end of the torch head 2| oxygen is emitted through the radial apertures 38 from the intermediate annular chamber 36 and gas is emitted from the outer annular chamber 21 which mixes with the oxygen passing through apertures 33 to form a combustible gas at the surfaces ofthe burner or torch head.

By proper manipulation of valves 59` and 60 it ispossible to provide on the one hand. a very fine needle point llame issuing from the central jet 35 at a time when the gas and oxygen supply is entirely shut off through the intermediate chamber 36 or the outer annular-chamber 31. On the other hand, it is possible to provide a large bushy flame with the central jet 3'5 shut on and with oxygen and gas mixing and burning just outside the intermediate chamber 36 and the It is also possible to provide a iiame made up of a combination of all burners,V under which conditions the pre-mixed gases issuing from the central-burner opening 35 is burningat the same time that a flame is being produced adjacent to the torch end of passages 36 and 21.

Thus there isprovided a very iiexible torch head and assembly that accomplishes the objective set'forth herein.v No'booster'is required to 1ncrease the pressure of the gases when using the present torch because only a relatively small portion of -the gas and oxygen -is pre-mixed; For the larger llame surface combustion isutilized.

It is, of course; recognized that a pair of torches for cross-fire operation can be utilized to advantage. f

I claim:

^ 1.,A'torch of the class described comprising tudinal center line of the torch, Vand intermediate and outer annular passage means disposed concentrically about the central orice, the intermediate annular passage at the face of the torch being broken up into a multitude of small passages, and the outer annular passage being entirely unobstructed throughout its circumference, means providing a mixing chamber communieating With the central passage, means providing an oxygen inlet passage and a gas inlet passage in the mixing chamber, gas inlet passage means communicating with the outer annular passage and oxygen inlet passage means communicating with the intermediate annular passage.

2. A torch of the class described comprising a central unobstructed passage means providing a relatively small orifice disposed on the longitudinal center line of the torch, and intermediate and outer annular passages disposed concentrically about the central orice, the intermediate annular passage at the face of the torch being broken up into a multitude of small passages and the outer annular passage being entirely unobstructed throughout its circumference, means providing a mixing chamber communicating with the central passage, oxygen inlet passage means and gas inlet passage means in the mixing chamber, gas inlet passage means communicating with the outer annular passage and oxygen inlet passage means communicating with the intermediate annular passage, a distributing valve for the two gas inlet passages, and a distributing valve for the two oxygen inlet passages.

WERNER H. I-IAAK.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 985,896 Hopkins Mar. 7, 1911 1,142,355 Mueller June 8, 1915 1,617,166 Schoop Feb. 8, 1927 1,800,616 Forster Apr. 14, 1931 1,808,968 Plumley June 9, 1931 1,865,905 Hammon July 5, 1932 1,973,371 Charles et al Sept. 11, 1934 2,054,601 Jenkins Sept. 15, 1936 2,134,169 Wright Oct. 5, 1938 2,210,402 Gaines Aug. 6, 1940 2,367,316 Skinner Jan. 16, 1945 2,376,413 Babcock May 22, 1945 2,397,165 Shepherd Mar. 26, 1946 

